Peace, Love and C++

Musings of a renegade developer

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Posted 4 months ago

After a quick rename, hy’s back, and better then ever.

I’ve taken a slightly different approach, and I’m now doing Python AST generation out of Lisp. I got things working so well, stack traces even make sense:

(defn foo []
    (raise (Exception "This isn't great")))
(foo)

And, when run:

(hy)[tag@leliel:~][01:28 PM]$ ~/dev/local/hy/bin/hython foo.hy 
Traceback (most recent call last):
  File "foo.hy", line 5, in <module>
    (foo)
  File "foo.hy", line 3, in foo
    (raise (Exception "This isn't great")))
Exception

In addition, I’ve added a few new syntax bits, and did some speed tests. Check out the gist — it turns out Hy is on-par with Python (whereas Clojure-Py (although much more featureful) is quite a bit slower)

To just show off a few things, here’s a small script to scrape NEW packages off the website

; NEW scraper

(import "lxml.html"
        "urllib2")

(def xpath "//tr[contains(@class, 'sourceNEW')]//td[@class='package']")
(def url "http://ftp-master.debian.org/new.html")

(def page (lxml.html.fromstring (.read (urllib2.urlopen url))))
(for [row (page.xpath xpath)]
  (print "NEW:" (row.text_content)))

More to come, methinks!